Title:
METHOD FOR EVALUATING PERMEABILITY OF HYDRATE-BEARING SEDIMENT
Document Type and Number:
WIPO Patent Application WO/2023/025326
Kind Code:
A1
Abstract:
A method for evaluating the permeability of a hydrate-bearing sediment. The method comprises: obtaining a complex conductivity spectroscopy of a hydrate-bearing sediment; calculating a hydrate saturation on the basis of the complex conductivity spectroscopy; calculating a formation factor by using an Archie's first law or calculating a formation factor by using a complex conductivity real part, a complex conductivity imaginary part and conductivity of pore water; and calculating the permeability of the hydrate-bearing sediment on the basis of a relaxation time in combination with the hydrate saturation, an occurrence mode correction coefficient and the formation factor, on the basis of a polarization amplitude in combination with the hydrate saturation, the occurrence mode correction coefficient and the formation factor, on the basis of a cation exchange capacity in combination with the hydrate saturation and the occurrence mode correction coefficient, or on the basis of an aperture size and a fractal dimension in combination with the hydrate saturation and the occurrence mode correction coefficient. The evaluation method has a wide measurement range, and has low required costs, a measured value of the permeability of a hydrate-bearing sediment can be accurately acquired, and the method has a high rate of accuracy, such that the microscopic porous structure of a hydrate-bearing sediment can be effectively reflected.
Inventors:
XING LANCHANG (CN)
WANG SHUO (CN)
ZHANG HUANHUAN (CN)
WANG BIN (CN)
WEI ZHOUTUO (CN)
GE XINMIN (CN)
DENG SHAOGUI (CN)
WANG SHUO (CN)
ZHANG HUANHUAN (CN)
WANG BIN (CN)
WEI ZHOUTUO (CN)
GE XINMIN (CN)
DENG SHAOGUI (CN)
Application Number:
PCT/CN2022/116966
Publication Date:
March 02, 2023
Filing Date:
September 05, 2022
Export Citation:
Assignee:
UNIV CHINA PETROLEUM EAST CHINA (CN)
International Classes:
G01N15/08
Foreign References:
| CN114063170A | 2022-02-18 | |||
| CN105240003A | 2016-01-13 | |||
| CN109932297A | 2019-06-25 | |||
| CN113406307A | 2021-09-17 | |||
| CN1570670A | 2005-01-26 | |||
| US20180348396A1 | 2018-12-06 | |||
| US6049209A | 2000-04-11 |
Other References:
WANG, HONGJIAN: "New Progress in Permeability Estimation from Induced Polarization Logging Data", CEJING-JISHU = WELL LOGGING TECHNOLOGY, XI'AN SHIYOU KANTAN YIQI ZONGCHANG, CN, vol. 32, no. 6, 20 December 2008 (2008-12-20), CN , pages 509 - 512, XP009543854, ISSN: 1004-1338, DOI: 10.16489/j.issn.1004-1338.2008.06.014
SONG YANJIE; WANG HE; TANG XIAOMIN; DENG XIN; LIU YUE: "Relationship Between Oil-water Relative Permeability and Resistivity of Shaly Rock Based on the Similarity Between Water Flow and Electric Current", CEJING-JISHU = WELL LOGGING TECHNOLOGY, XI'AN SHIYOU KANTAN YIQI ZONGCHANG, CN, vol. 39, no. 05, 20 October 2015 (2015-10-20), CN , pages 543 - 549+560, XP009543826, ISSN: 1004-1338, DOI: 10.16489/j.issn.1004-1338.2015.05.02
TIAN, MI; HOU, ZHENGMENG; LI, ZHANDONG; HU, XIUQUAN: "Application of Archie formula in the Interpretation of Extra Low Permeability Reservoir After Deformation", JOURNAL OF CHONGQING UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE), vol. 31, no. 10, 15 October 2017 (2017-10-15), pages 128 - 133, XP009543852, ISSN: 1674-8425, DOI: 10.3969/j.issn.1674-8425(z).2017.10.021
SONG YANJIE; WANG HE; TANG XIAOMIN; DENG XIN; LIU YUE: "Relationship Between Oil-water Relative Permeability and Resistivity of Shaly Rock Based on the Similarity Between Water Flow and Electric Current", CEJING-JISHU = WELL LOGGING TECHNOLOGY, XI'AN SHIYOU KANTAN YIQI ZONGCHANG, CN, vol. 39, no. 05, 20 October 2015 (2015-10-20), CN , pages 543 - 549+560, XP009543826, ISSN: 1004-1338, DOI: 10.16489/j.issn.1004-1338.2015.05.02
TIAN, MI; HOU, ZHENGMENG; LI, ZHANDONG; HU, XIUQUAN: "Application of Archie formula in the Interpretation of Extra Low Permeability Reservoir After Deformation", JOURNAL OF CHONGQING UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE), vol. 31, no. 10, 15 October 2017 (2017-10-15), pages 128 - 133, XP009543852, ISSN: 1674-8425, DOI: 10.3969/j.issn.1674-8425(z).2017.10.021
Attorney, Agent or Firm:
QINGDAO LAWSCI INTELLECTUAL PROPERTY CO., LTD. (CN)
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